114 lines
2.7 KiB
C
114 lines
2.7 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/*
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* Copyright (C) 2020, Linaro Limited
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*/
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#include <common.h>
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#include <clk.h>
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#include <dm.h>
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#include <malloc.h>
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#include <reset.h>
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#include <asm/io.h>
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#include <asm/scmi_test.h>
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#include <dm/device_compat.h>
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/*
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* Simulate to some extent a SCMI exchange.
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* This drivers gets SCMI resources and offers API function to the
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* SCMI test sequence manipulate the resources, currently clock
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* and reset controllers.
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*/
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#define SCMI_TEST_DEVICES_CLK_COUNT 3
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#define SCMI_TEST_DEVICES_RD_COUNT 1
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/*
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* struct sandbox_scmi_device_priv - Storage for device handles used by test
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* @clk: Array of clock instances used by tests
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* @reset_clt: Array of the reset controller instances used by tests
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* @devices: Resources exposed by sandbox_scmi_devices_ctx()
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*/
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struct sandbox_scmi_device_priv {
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struct clk clk[SCMI_TEST_DEVICES_CLK_COUNT];
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struct reset_ctl reset_ctl[SCMI_TEST_DEVICES_RD_COUNT];
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struct sandbox_scmi_devices devices;
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};
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struct sandbox_scmi_devices *sandbox_scmi_devices_ctx(struct udevice *dev)
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{
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struct sandbox_scmi_device_priv *priv = dev_get_priv(dev);
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if (priv)
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return &priv->devices;
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return NULL;
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}
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static int sandbox_scmi_devices_remove(struct udevice *dev)
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{
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struct sandbox_scmi_devices *devices = sandbox_scmi_devices_ctx(dev);
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int ret = 0;
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size_t n;
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for (n = 0; n < SCMI_TEST_DEVICES_RD_COUNT; n++) {
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int ret2 = reset_free(devices->reset + n);
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if (ret2 && !ret)
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ret = ret2;
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}
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return ret;
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}
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static int sandbox_scmi_devices_probe(struct udevice *dev)
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{
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struct sandbox_scmi_device_priv *priv = dev_get_priv(dev);
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int ret;
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size_t n;
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priv->devices = (struct sandbox_scmi_devices){
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.clk = priv->clk,
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.clk_count = SCMI_TEST_DEVICES_CLK_COUNT,
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.reset = priv->reset_ctl,
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.reset_count = SCMI_TEST_DEVICES_RD_COUNT,
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};
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for (n = 0; n < SCMI_TEST_DEVICES_CLK_COUNT; n++) {
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ret = clk_get_by_index(dev, n, priv->devices.clk + n);
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if (ret) {
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dev_err(dev, "%s: Failed on clk %zu\n", __func__, n);
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return ret;
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}
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}
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for (n = 0; n < SCMI_TEST_DEVICES_RD_COUNT; n++) {
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ret = reset_get_by_index(dev, n, priv->devices.reset + n);
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if (ret) {
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dev_err(dev, "%s: Failed on reset %zu\n", __func__, n);
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goto err_reset;
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}
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}
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return 0;
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err_reset:
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for (; n > 0; n--)
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reset_free(priv->devices.reset + n - 1);
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return ret;
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}
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static const struct udevice_id sandbox_scmi_devices_ids[] = {
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{ .compatible = "sandbox,scmi-devices" },
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{ }
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};
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U_BOOT_DRIVER(sandbox_scmi_devices) = {
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.name = "sandbox-scmi_devices",
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.id = UCLASS_MISC,
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.of_match = sandbox_scmi_devices_ids,
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.priv_auto_alloc_size = sizeof(struct sandbox_scmi_device_priv),
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.remove = sandbox_scmi_devices_remove,
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.probe = sandbox_scmi_devices_probe,
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};
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